Test green

.gitignore

@@ -3,3 +3,4 @@ obj
 .suo
 .user
 .vs
+appsettings.json

DataLayer/DataLayer.csproj

@@ -1,7 +1,21 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <TargetFramework>net5.0</TargetFramework>
   </PropertyGroup>
 
+  <ItemGroup>
+    <Content Include="..\..\..\..\.nuget\packages\microsoft.azure.cosmos\3.19.0\contentFiles\any\netstandard2.0\ThirdPartyNotice.txt" Link="ThirdPartyNotice.txt">
+      <Private>False</Private>
+      <NuGetPackageVersion>3.19.0</NuGetPackageVersion>
+      <NuGetItemType>Content</NuGetItemType>
+      <NuGetPackageId>Microsoft.Azure.Cosmos</NuGetPackageId>
+      <Pack>false</Pack>
+    </Content>
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Azure.Cosmos" Version="3.19.0" />
+  </ItemGroup>
+
 </Project>

DataLayer/PeopleData.cs

@@ -1,8 +1,42 @@
-using System;
+using Microsoft.Azure.Cosmos;
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
 
 namespace DataLayer
 {
+    /// <summary>
+    /// A Data Access Layer (DAL) object for People.
+    /// </summary>
     public class PeopleData
     {
+        private readonly Container _container;
+        private string ContainerId { get; set; }
+
+        public PeopleData(CosmosClient client, string databaseId, string containerId = "People")
+        {
+            ContainerId = containerId;
+            _container = client.GetContainer(databaseId, containerId);
+        }
+
+        /// <summary>
+        /// Gets all people.
+        /// </summary>
+        /// <returns><see cref="IEnumerable{Person}"/></returns>
+        public async Task<IEnumerable<Person>> GetAll()
+        {
+            // Define a Query
+            var query = new QueryDefinition($"SELECT * FROM {ContainerId}");
+
+            // Get an Iterator
+            var iterator = _container.GetItemQueryIterator<Person>(query);
+
+            // Get the first page of results
+            var response = await iterator.ReadNextAsync();
+
+            //TODO: Paging
+
+            return response.Resource;
+        }
     }
 }

DataLayer/Person.cs

@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DataLayer
+{
+    /// <summary>
+    /// A Person Model
+    /// </summary>
+    /// <remarks>AKA DTO (data transfer object), POCO (plain old c# object)</remarks>
+    public class Person
+    {
+        //TODO: Properties
+    }
+}

DataLayerTests/CosmosTest.cs

@@ -0,0 +1,30 @@
+using Microsoft.Extensions.Configuration;
+using System;
+using System.IO;
+
+namespace DataLayerTests
+{
+    /// <summary>
+    /// Test helper base class
+    /// </summary>
+    public abstract class CosmosTest
+    {
+        // load configuration from appsettings.json file
+        protected static readonly IConfiguration _config = new ConfigurationBuilder()
+            .SetBasePath(Directory.GetCurrentDirectory())
+            .AddJsonFile("appsettings.json", optional: false)
+            .Build();
+
+        // Constants for App Settings keys
+        protected const string CosmosDataConnectionStringKey = "Cosmos_ConnectionString";
+        protected const string CosmosDataDatabaseIdKey = "Cosmos_DatabaseId";
+
+        public CosmosTest()
+        {
+            // Ensure app settings exist
+            if (string.IsNullOrEmpty(_config[CosmosDataConnectionStringKey])) 
+                throw new InvalidOperationException($"{CosmosDataConnectionStringKey} must be set");
+            if (string.IsNullOrEmpty(_config[CosmosDataDatabaseIdKey])) 
+                throw new InvalidOperationException($"{CosmosDataDatabaseIdKey} must be set");        }
+    }
+}

DataLayerTests/DataLayerTests.csproj

@@ -7,14 +7,28 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="Microsoft.Azure.Cosmos" Version="3.19.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.7.1" />
     <PackageReference Include="MSTest.TestAdapter" Version="2.1.1" />
     <PackageReference Include="MSTest.TestFramework" Version="2.1.1" />
     <PackageReference Include="coverlet.collector" Version="1.3.0" />
+    <PackageReference Include="Microsoft.Extensions.Configuration" Version="5.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.Abstractions" Version="5.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.FileExtensions" Version="5.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="5.0.0" />
   </ItemGroup>
 
   <ItemGroup>
     <ProjectReference Include="..\DataLayer\DataLayer.csproj" />
   </ItemGroup>
 
+  <ItemGroup>
+    <None Update="appsettings.example.json">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
+    <None Update="appsettings.json">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
+  </ItemGroup>
+
 </Project>

DataLayerTests/PeopleDataTests.cs

@@ -1,19 +1,26 @@
 using DataLayer;
+using Microsoft.Azure.Cosmos;
 using Microsoft.VisualStudio.TestTools.UnitTesting;
 using System.Linq;
 using System.Threading.Tasks;
 
 namespace DataLayerTests
 {
     [TestClass]
-    [TestCategory("Integration")]
-    public class PeopleDataTests
+    public class PeopleDataTests : CosmosTest
     {
         [TestMethod]
+        // Marks this test as an Integration test to that it can be excluded from CI Builds.
+        [TestCategory("Integration")]
         public async Task GetAll()
         {
             // arrange
-            var data = new PeopleData();
+
+            // Create a CosmosClient
+            var client = new CosmosClient(_config["Cosmos_ConnectionString"]);
+
+            // Inject into PeopleData. IRL we would do this with IoC
+            var data = new PeopleData(client, _config["Cosmos_DatabaseId"]);
 
             // act
             var people = await data.GetAll();

DataLayerTests/appsettings.example.json

@@ -0,0 +1,9 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Debug"
+    }
+  },
+  "CosmosData_ConnectionString": "",
+  "CosmosData_DatabaseId": ""
+}